<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>

        // var num = 0;
        // while(num<10){
        //     console.log(num);
        //     num += 2;
        // }

        // for(var i=1;i<=10;i+=2){
        //     console.log(i);
        // }
    </script>
</body>
</html>